Senior API Migration Engineer (REST APIs - Cloud Migration)

Senior API Migration Engineer (REST APIs - Cloud Migration)

Anywhere

Type: Contract

Category: Engineer

Industry: Financial Services

Workplace Type: Remote

Reference ID: JN -042026-106219

Date Posted: 03/31/2026

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Description:

Remote

Our client seeks a Senior API Migration Engineer to lead the migration, validation, and optimization of REST APIs from on-prem Exadata to Oracle Database in the cloud. The role focuses on compatibility remediation, authentication alignment, performance tuning, and end-to-end validation using tools such as Postman or Insomnia. The engineer will coordinate with IT teams on migration strategy, testing cycles, and release readiness while maintaining reliability and security standards. This is not a net-new development role.

Rate: $65.00 to $75.00/hr. w2

JN -042026-106219

#LI-JS1

Responsibilities:

• Lead migration and validation of REST APIs from on-prem Exadata to Oracle Database Cloud.

• Analyze and remediate API compatibility issues across endpoint changes, authentication mechanisms, and data handling logic.

• Execute API testing and validation using Postman and Insomnia.

• Optimize API performance within the Oracle Cloud environment.

• Update backend queries, stored procedures, and integrations impacted by migration.

• Partner with internal IT teams on migration strategy, testing cycles, and release readiness.

• Troubleshoot and resolve API defects during validation cycles.

• Ensure APIs meet performance, reliability, and security standards post-migration.

Experience Requirements:

• 6-10 years of experience in API engineering with a focus on migration work.

• Demonstrated experience migrating REST APIs in enterprise environments.

• Strong experience with REST API design, testing, and validation.

• Experience executing API migration between environments from on-prem to cloud.

• Hands-on experience with Postman and/or Insomnia.

• Experience with Oracle databases including Exadata and Oracle Database Cloud.

• Experience modifying API integrations tied to database changes.

• Understanding of authentication mechanisms such as OAuth and token-based methods.

• Ability to work in large-scale data environments.

• Preferred experience with Oracle Database Cloud migrations, financial services or regulated environments, large-scale data systems, and platform modernization initiatives.

Recruitment Transparency Notice

Eliassen Group values transparency in our recruitment practices. Please be advised that Eliassen Group utilizes artificial intelligence (AI) tools as part of its initial application screening and hiring process. You may receive email and SMS notifications from the Eliassen Virtual Recruiting Team ( [email protected] , 781-808-2924) inviting you to complete a brief voice screening as part of your application process. These tools assist our hiring teams in different ways, including but not limited to, assistance in reviewing application materials to help identify candidates whose qualifications most closely match the requirements of the position. All AI-assisted evaluations and responses are reviewed by human recruiters before any hiring decisions are made. The use of AI in our process is intended to support fairness, efficiency, and consistency, and Eliassen Group takes measures to prevent bias or discrimination in connection with its hiring practices. By proceeding, you acknowledge, agree, and consent to Eliassen Group's use of these tools, including AI tools, as part of the application and hiring process.

Skills, experience, and other compensable factors will be considered when determining pay rate. The pay range provided in this posting reflects a W2 hourly rate; other employment options may be available that may result in pay outside of the provided range.

W2 employees of Eliassen Group who are regularly scheduled to work 30 or more hours per week are eligible for the following benefits: medical (choice of 3 plans), dental, vision, pre-tax accounts, other voluntary benefits including life and disability insurance, 401(k) with match, and sick time if required by law in the worked-in state/locality.

If anyone reaches out to you about an open position connected with Eliassen Group, please ensure that you are working directly with us by confirming the following:

· When you work with Eliassen Group, all email communication will come from an Eliassen.com address, never Gmail, Yahoo, etc.

· Eliassen Group will never ask you for personal information (home address, bank account, or check routing number) until you have worked with someone clearly associated with Eliassen Group.

If you have any indication of fraudulent activity, please contact [email protected] _.

About Eliassen Group:

Eliassen Group is a strategic consulting firm that helps organizations reach further and achieve more through our technology, business advisory, and life sciences solutions. For nearly 40 years, we have combined exceptional people, deep domain expertise, and intelligent capabilities to expand our clients' capacity and accelerate meaningful outcomes. We are driven by a purpose to positively impact the lives of our employees, clients, consultants, and the communities we serve.

Eliassen is committed to building a diverse and inclusive team from a variety of backgrounds, perspectives, and skills. We are an Equal Opportunity and Affirmative Action Employer and all employment decisions are based on merit, performance, and business needs. Eliassen does not discriminate on the basis of race, color, gender identity or expression, sexual preference or orientation, sex (including pregnancy, childbirth, and related medical conditions), marital status, creed, religion, physical or mental disability, genetic information, military or veteran status, age, ancestry, national origin, citizenship status, prohibited criminal record inquiries of applicants and employees, or any other category protected by federal, state, or local laws.

Don't miss out on our referral program! If we hire a candidate that you refer us to then you can be eligible for a $1,000 referral check!_